Guelph Temperatures: Averages by Month

Days of Hot Weather in Guelph

The hottest days at Guelph usually have temperatures peaking in the low-thirties Celsius. The city averages seven days a year with thirty-degree weather, which can show up from May to September. Temperatures above 35 °C (95 °F), happen on an average of three days a decade.

When Guelph Has Frosty Weather

Guelph typically has 160 days a year when the minimum temperature is at 0 °C or below. The average date for the last frost in spring is May 18. Frost normally returns here on September 22. The frost-free period extends for 125 days on average between the final spring frost and the first fall frost.

How Often Guelph Has Cold Temperatures

Guelph's chilliest winter nights have lows in the minus-twenties °C (below -3 °F). The city averages eight nights a year, usually in January and February, when the thermometer drops that low. Temperatures below -30 °C (-22 °F) happen about once every two or three years.

From November to April, Guelph can remain below freezing all day long. The city typically has 66 days a year when the temperature never rises above 0 °C.